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8th Grade Science Mrs. Winters
Some images are from www.chem4kids.com
www.middleschoolscience.com 2008
HOMEROOM
* WORK ON MISSING ASSIGNMENTS!!! NO READING
Fun Friday for:
• Judith
• Kelly G
• Kelly L
• Dariush
• Keana
• Keely
Materials Needed Today Please take these materials out of your backpack.
•Pencil
•Adopt and Element
Hot Sync Wednesday 1/22/14
Answer the following questions in complete sentences on the hot sync
worksheet.
1) Draw your element that
you adopted using the Bohr
model showing the valence
electrons and the protons and
neutrons.
Families on the Periodic Table Elements on the periodic table can be grouped into
families bases on their chemical properties.
Each family has a specific name to differentiate it from the other families in the periodic table.
Elements in each family
react differently with
other elements.
ALKALI METALS
Group 1
1 electron in the outer shell
Soft and silvery metals
Very reactive, esp. with water
Conduct electricity
Hydrogen is not a member, because hydrogen is a non-metal
Image: http://www.learner.org/interactives/periodic/groups2.html
ALKALINE EARTH METALS Group 2
2 electrons in the outer shell
White and malleable
Reactive, but less than Alkali metals
Conduct electricity
TRANSITION METALS Groups in the middle Good conductors of
heat and electricity. Some are used for
jewelry. The transition metals
are able to put up to 32 electrons in their second to last shell.
Can bond with many elements in a variety of shapes.
CARBON FAMILY Group 4
4 electrons in the outer shell
Contains metals, metalloids, and a non-metal Carbon (C)
NITROGEN FAMILY Group 5
5 electrons in the outer shell
Can share electrons to form compounds
Contains metals, metalloids, and non-metals
OXYGEN FAMILY Group 6
6 electrons in the outer shell
Contains metals, metalloids, and non-metals
Reactive
Halogens Group 7
7 electrons in the outer shell
All are non-metals
Very reactive are often bonded with elements from Group 1
Noble Gases Group 8
Exist as gases
Non-metals
8 electrons in the outer shell = Full
Helium (He) has only 2 electrons in the outer shell = Full
Not reactive with other elements
Rare Earth Metals Some are
Radioactive
The rare earths are silver, silvery-white, or gray metals.
Conduct electricity